[14489] | 1 | # $Id: Embed.pm,v 1.1.1.1 2002/01/16 19:27:19 schwern Exp $
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| 2 | require 5.002;
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| 3 |
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| 4 | package ExtUtils::Embed;
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| 5 | require Exporter;
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| 6 | require FileHandle;
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| 7 | use Config;
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| 8 | use Getopt::Std;
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| 9 | use File::Spec;
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| 10 |
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| 11 | #Only when we need them
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| 12 | #require ExtUtils::MakeMaker;
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| 13 | #require ExtUtils::Liblist;
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| 14 |
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| 15 | use vars qw(@ISA @EXPORT $VERSION
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| 16 | @Extensions $Verbose $lib_ext
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| 17 | $opt_o $opt_s
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| 18 | );
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| 19 | use strict;
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| 20 |
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| 21 | $VERSION = 1.26;
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| 22 |
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| 23 | @ISA = qw(Exporter);
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| 24 | @EXPORT = qw(&xsinit &ldopts
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| 25 | &ccopts &ccflags &ccdlflags &perl_inc
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| 26 | &xsi_header &xsi_protos &xsi_body);
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| 27 |
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| 28 | #let's have Miniperl borrow from us instead
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| 29 | #require ExtUtils::Miniperl;
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| 30 | #*canon = \&ExtUtils::Miniperl::canon;
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| 31 |
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| 32 | $Verbose = 0;
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| 33 | $lib_ext = $Config{lib_ext} || '.a';
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| 34 |
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| 35 | sub is_cmd { $0 eq '-e' }
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| 36 |
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| 37 | sub my_return {
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| 38 | my $val = shift;
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| 39 | if(is_cmd) {
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| 40 | print $val;
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| 41 | }
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| 42 | else {
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| 43 | return $val;
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| 44 | }
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| 45 | }
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| 46 |
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| 47 | sub xsinit {
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| 48 | my($file, $std, $mods) = @_;
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| 49 | my($fh,@mods,%seen);
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| 50 | $file ||= "perlxsi.c";
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| 51 | my $xsinit_proto = "pTHX";
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| 52 |
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| 53 | if (@_) {
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| 54 | @mods = @$mods if $mods;
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| 55 | }
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| 56 | else {
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| 57 | getopts('o:s:');
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| 58 | $file = $opt_o if defined $opt_o;
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| 59 | $std = $opt_s if defined $opt_s;
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| 60 | @mods = @ARGV;
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| 61 | }
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| 62 | $std = 1 unless scalar @mods;
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| 63 |
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| 64 | if ($file eq "STDOUT") {
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| 65 | $fh = \*STDOUT;
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| 66 | }
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| 67 | else {
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| 68 | $fh = new FileHandle "> $file";
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| 69 | }
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| 70 |
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| 71 | push(@mods, static_ext()) if defined $std;
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| 72 | @mods = grep(!$seen{$_}++, @mods);
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| 73 |
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| 74 | print $fh &xsi_header();
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| 75 | print $fh "EXTERN_C void xs_init ($xsinit_proto);\n\n";
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| 76 | print $fh &xsi_protos(@mods);
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| 77 |
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| 78 | print $fh "\nEXTERN_C void\nxs_init($xsinit_proto)\n{\n";
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| 79 | print $fh &xsi_body(@mods);
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| 80 | print $fh "}\n";
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| 81 |
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| 82 | }
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| 83 |
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| 84 | sub xsi_header {
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| 85 | return <<EOF;
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| 86 | #include <EXTERN.h>
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| 87 | #include <perl.h>
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| 88 |
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| 89 | EOF
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| 90 | }
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| 91 |
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| 92 | sub xsi_protos {
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| 93 | my(@exts) = @_;
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| 94 | my(@retval,%seen);
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| 95 | my $boot_proto = "pTHX_ CV* cv";
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| 96 | foreach $_ (@exts){
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| 97 | my($pname) = canon('/', $_);
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| 98 | my($mname, $cname);
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| 99 | ($mname = $pname) =~ s!/!::!g;
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| 100 | ($cname = $pname) =~ s!/!__!g;
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| 101 | my($ccode) = "EXTERN_C void boot_${cname} ($boot_proto);\n";
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| 102 | next if $seen{$ccode}++;
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| 103 | push(@retval, $ccode);
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| 104 | }
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| 105 | return join '', @retval;
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| 106 | }
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| 107 |
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| 108 | sub xsi_body {
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| 109 | my(@exts) = @_;
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| 110 | my($pname,@retval,%seen);
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| 111 | my($dl) = canon('/','DynaLoader');
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| 112 | push(@retval, "\tchar *file = __FILE__;\n");
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| 113 | push(@retval, "\tdXSUB_SYS;\n") if $] > 5.002;
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| 114 | push(@retval, "\n");
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| 115 |
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| 116 | foreach $_ (@exts){
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| 117 | my($pname) = canon('/', $_);
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| 118 | my($mname, $cname, $ccode);
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| 119 | ($mname = $pname) =~ s!/!::!g;
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| 120 | ($cname = $pname) =~ s!/!__!g;
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| 121 | if ($pname eq $dl){
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| 122 | # Must NOT install 'DynaLoader::boot_DynaLoader' as 'bootstrap'!
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| 123 | # boot_DynaLoader is called directly in DynaLoader.pm
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| 124 | $ccode = "\t/* DynaLoader is a special case */\n\tnewXS(\"${mname}::boot_${cname}\", boot_${cname}, file);\n";
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| 125 | push(@retval, $ccode) unless $seen{$ccode}++;
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| 126 | } else {
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| 127 | $ccode = "\tnewXS(\"${mname}::bootstrap\", boot_${cname}, file);\n";
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| 128 | push(@retval, $ccode) unless $seen{$ccode}++;
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| 129 | }
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| 130 | }
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| 131 | return join '', @retval;
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| 132 | }
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| 133 |
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| 134 | sub static_ext {
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| 135 | unless (scalar @Extensions) {
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| 136 | @Extensions = sort split /\s+/, $Config{static_ext};
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| 137 | unshift @Extensions, qw(DynaLoader);
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| 138 | }
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| 139 | @Extensions;
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| 140 | }
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| 141 |
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| 142 | sub _escape {
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| 143 | my $arg = shift;
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| 144 | $$arg =~ s/([\(\)])/\\$1/g;
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| 145 | }
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| 146 |
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| 147 | sub _ldflags {
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| 148 | my $ldflags = $Config{ldflags};
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| 149 | _escape(\$ldflags);
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| 150 | return $ldflags;
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| 151 | }
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| 152 |
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| 153 | sub _ccflags {
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| 154 | my $ccflags = $Config{ccflags};
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| 155 | _escape(\$ccflags);
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| 156 | return $ccflags;
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| 157 | }
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| 158 |
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| 159 | sub _ccdlflags {
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| 160 | my $ccdlflags = $Config{ccdlflags};
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| 161 | _escape(\$ccdlflags);
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| 162 | return $ccdlflags;
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| 163 | }
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| 164 |
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| 165 | sub ldopts {
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| 166 | require ExtUtils::MakeMaker;
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| 167 | require ExtUtils::Liblist;
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| 168 | my($std,$mods,$link_args,$path) = @_;
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| 169 | my(@mods,@link_args,@argv);
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| 170 | my($dllib,$config_libs,@potential_libs,@path);
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| 171 | local($") = ' ' unless $" eq ' ';
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| 172 | if (scalar @_) {
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| 173 | @link_args = @$link_args if $link_args;
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| 174 | @mods = @$mods if $mods;
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| 175 | }
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| 176 | else {
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| 177 | @argv = @ARGV;
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| 178 | #hmm
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| 179 | while($_ = shift @argv) {
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| 180 | /^-std$/ && do { $std = 1; next; };
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| 181 | /^--$/ && do { @link_args = @argv; last; };
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| 182 | /^-I(.*)/ && do { $path = $1 || shift @argv; next; };
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| 183 | push(@mods, $_);
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| 184 | }
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| 185 | }
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| 186 | $std = 1 unless scalar @link_args;
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| 187 | my $sep = $Config{path_sep} || ':';
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| 188 | @path = $path ? split(/\Q$sep/, $path) : @INC;
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| 189 |
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| 190 | push(@potential_libs, @link_args) if scalar @link_args;
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| 191 | # makemaker includes std libs on windows by default
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| 192 | if ($^O ne 'MSWin32' and defined($std)) {
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| 193 | push(@potential_libs, $Config{perllibs});
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| 194 | }
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| 195 |
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| 196 | push(@mods, static_ext()) if $std;
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| 197 |
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| 198 | my($mod,@ns,$root,$sub,$extra,$archive,@archives);
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| 199 | print STDERR "Searching (@path) for archives\n" if $Verbose;
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| 200 | foreach $mod (@mods) {
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| 201 | @ns = split(/::|\/|\\/, $mod);
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| 202 | $sub = $ns[-1];
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| 203 | $root = File::Spec->catdir(@ns);
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| 204 |
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| 205 | print STDERR "searching for '$sub${lib_ext}'\n" if $Verbose;
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| 206 | foreach (@path) {
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| 207 | next unless -e ($archive = File::Spec->catdir($_,"auto",$root,"$sub$lib_ext"));
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| 208 | push @archives, $archive;
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| 209 | if(-e ($extra = File::Spec->catdir($_,"auto",$root,"extralibs.ld"))) {
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| 210 | local(*FH);
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| 211 | if(open(FH, $extra)) {
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| 212 | my($libs) = <FH>; chomp $libs;
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| 213 | push @potential_libs, split /\s+/, $libs;
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| 214 | }
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| 215 | else {
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| 216 | warn "Couldn't open '$extra'";
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| 217 | }
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| 218 | }
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| 219 | last;
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| 220 | }
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| 221 | }
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| 222 | #print STDERR "\@potential_libs = @potential_libs\n";
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| 223 |
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| 224 | my $libperl;
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| 225 | if ($^O eq 'MSWin32') {
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| 226 | $libperl = $Config{libperl};
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| 227 | }
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| 228 | else {
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| 229 | $libperl = (grep(/^-l\w*perl\w*$/, @link_args))[0]
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| 230 | || ($Config{libperl} =~ /^lib(\w+)(\Q$lib_ext\E|\.\Q$Config{dlext}\E)$/
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| 231 | ? "-l$1" : '')
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| 232 | || "-lperl";
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| 233 | }
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| 234 |
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| 235 | my $lpath = File::Spec->catdir($Config{archlibexp}, 'CORE');
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| 236 | $lpath = qq["$lpath"] if $^O eq 'MSWin32';
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| 237 | my($extralibs, $bsloadlibs, $ldloadlibs, $ld_run_path) =
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| 238 | MM->ext(join ' ', "-L$lpath", $libperl, @potential_libs);
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| 239 |
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| 240 | my $ld_or_bs = $bsloadlibs || $ldloadlibs;
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| 241 | print STDERR "bs: $bsloadlibs ** ld: $ldloadlibs" if $Verbose;
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| 242 | my $ccdlflags = _ccdlflags();
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| 243 | my $ldflags = _ldflags();
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| 244 | my $linkage = "$ccdlflags $ldflags @archives $ld_or_bs";
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| 245 | print STDERR "ldopts: '$linkage'\n" if $Verbose;
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| 246 |
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| 247 | return $linkage if scalar @_;
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| 248 | my_return("$linkage\n");
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| 249 | }
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| 250 |
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| 251 | sub ccflags {
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| 252 | my $ccflags = _ccflags();
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| 253 | my_return(" $ccflags ");
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| 254 | }
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| 255 |
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| 256 | sub ccdlflags {
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| 257 | my $ccdlflags = _ccdlflags();
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| 258 | my_return(" $ccdlflags ");
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| 259 | }
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| 260 |
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| 261 | sub perl_inc {
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| 262 | my $dir = File::Spec->catdir($Config{archlibexp}, 'CORE');
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| 263 | $dir = qq["$dir"] if $^O eq 'MSWin32';
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| 264 | my_return(" -I$dir ");
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| 265 | }
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| 266 |
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| 267 | sub ccopts {
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| 268 | ccflags . perl_inc;
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| 269 | }
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| 270 |
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| 271 | sub canon {
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| 272 | my($as, @ext) = @_;
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| 273 | foreach(@ext) {
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| 274 | # might be X::Y or lib/auto/X/Y/Y.a
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| 275 | next if s!::!/!g;
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| 276 | s:^(lib|ext)/(auto/)?::;
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| 277 | s:/\w+\.\w+$::;
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| 278 | }
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| 279 | grep(s:/:$as:, @ext) if ($as ne '/');
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| 280 | @ext;
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| 281 | }
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| 282 |
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| 283 | __END__
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| 284 |
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| 285 | =head1 NAME
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| 286 |
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| 287 | ExtUtils::Embed - Utilities for embedding Perl in C/C++ applications
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| 288 |
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| 289 | =head1 SYNOPSIS
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| 290 |
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| 291 |
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| 292 | perl -MExtUtils::Embed -e xsinit
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| 293 | perl -MExtUtils::Embed -e ccopts
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| 294 | perl -MExtUtils::Embed -e ldopts
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| 295 |
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| 296 | =head1 DESCRIPTION
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| 297 |
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| 298 | ExtUtils::Embed provides utility functions for embedding a Perl interpreter
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| 299 | and extensions in your C/C++ applications.
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| 300 | Typically, an application B<Makefile> will invoke ExtUtils::Embed
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| 301 | functions while building your application.
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| 302 |
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| 303 | =head1 @EXPORT
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| 304 |
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| 305 | ExtUtils::Embed exports the following functions:
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| 306 |
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| 307 | xsinit(), ldopts(), ccopts(), perl_inc(), ccflags(),
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| 308 | ccdlflags(), xsi_header(), xsi_protos(), xsi_body()
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| 309 |
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| 310 | =head1 FUNCTIONS
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| 311 |
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| 312 | =over 4
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| 313 |
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| 314 | =item xsinit()
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| 315 |
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| 316 | Generate C/C++ code for the XS initializer function.
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| 317 |
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| 318 | When invoked as C<`perl -MExtUtils::Embed -e xsinit --`>
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| 319 | the following options are recognized:
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| 320 |
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| 321 | B<-o> E<lt>output filenameE<gt> (Defaults to B<perlxsi.c>)
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| 322 |
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| 323 | B<-o STDOUT> will print to STDOUT.
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| 324 |
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| 325 | B<-std> (Write code for extensions that are linked with the current Perl.)
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| 326 |
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| 327 | Any additional arguments are expected to be names of modules
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| 328 | to generate code for.
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| 329 |
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| 330 | When invoked with parameters the following are accepted and optional:
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| 331 |
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| 332 | C<xsinit($filename,$std,[@modules])>
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| 333 |
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| 334 | Where,
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| 335 |
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| 336 | B<$filename> is equivalent to the B<-o> option.
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| 337 |
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| 338 | B<$std> is boolean, equivalent to the B<-std> option.
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| 339 |
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| 340 | B<[@modules]> is an array ref, same as additional arguments mentioned above.
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| 341 |
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| 342 | =item Examples
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| 343 |
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| 344 |
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| 345 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c Socket
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| 346 |
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| 347 |
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| 348 | This will generate code with an B<xs_init> function that glues the perl B<Socket::bootstrap> function
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| 349 | to the C B<boot_Socket> function and writes it to a file named F<xsinit.c>.
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| 350 |
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| 351 | Note that B<DynaLoader> is a special case where it must call B<boot_DynaLoader> directly.
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| 352 |
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| 353 | perl -MExtUtils::Embed -e xsinit
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| 354 |
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| 355 |
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| 356 | This will generate code for linking with B<DynaLoader> and
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| 357 | each static extension found in B<$Config{static_ext}>.
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| 358 | The code is written to the default file name B<perlxsi.c>.
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| 359 |
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| 360 |
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| 361 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c -std DBI DBD::Oracle
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| 362 |
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| 363 |
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| 364 | Here, code is written for all the currently linked extensions along with code
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| 365 | for B<DBI> and B<DBD::Oracle>.
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| 366 |
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| 367 | If you have a working B<DynaLoader> then there is rarely any need to statically link in any
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| 368 | other extensions.
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| 369 |
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| 370 | =item ldopts()
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| 371 |
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| 372 | Output arguments for linking the Perl library and extensions to your
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| 373 | application.
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| 374 |
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| 375 | When invoked as C<`perl -MExtUtils::Embed -e ldopts --`>
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| 376 | the following options are recognized:
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| 377 |
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| 378 | B<-std>
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| 379 |
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| 380 | Output arguments for linking the Perl library and any extensions linked
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| 381 | with the current Perl.
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| 382 |
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| 383 | B<-I> E<lt>path1:path2E<gt>
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| 384 |
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| 385 | Search path for ModuleName.a archives.
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| 386 | Default path is B<@INC>.
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| 387 | Library archives are expected to be found as
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| 388 | B</some/path/auto/ModuleName/ModuleName.a>
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| 389 | For example, when looking for B<Socket.a> relative to a search path,
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| 390 | we should find B<auto/Socket/Socket.a>
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| 391 |
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| 392 | When looking for B<DBD::Oracle> relative to a search path,
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| 393 | we should find B<auto/DBD/Oracle/Oracle.a>
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| 394 |
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| 395 | Keep in mind that you can always supply B</my/own/path/ModuleName.a>
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| 396 | as an additional linker argument.
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| 397 |
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| 398 | B<--> E<lt>list of linker argsE<gt>
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| 399 |
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| 400 | Additional linker arguments to be considered.
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| 401 |
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| 402 | Any additional arguments found before the B<--> token
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| 403 | are expected to be names of modules to generate code for.
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| 404 |
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| 405 | When invoked with parameters the following are accepted and optional:
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| 406 |
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| 407 | C<ldopts($std,[@modules],[@link_args],$path)>
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| 408 |
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| 409 | Where:
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| 410 |
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| 411 | B<$std> is boolean, equivalent to the B<-std> option.
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| 412 |
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| 413 | B<[@modules]> is equivalent to additional arguments found before the B<--> token.
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| 414 |
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| 415 | B<[@link_args]> is equivalent to arguments found after the B<--> token.
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| 416 |
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| 417 | B<$path> is equivalent to the B<-I> option.
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| 418 |
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| 419 | In addition, when ldopts is called with parameters, it will return the argument string
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| 420 | rather than print it to STDOUT.
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| 421 |
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| 422 | =item Examples
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| 423 |
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| 424 |
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| 425 | perl -MExtUtils::Embed -e ldopts
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| 426 |
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| 427 |
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| 428 | This will print arguments for linking with B<libperl.a>, B<DynaLoader> and
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| 429 | extensions found in B<$Config{static_ext}>. This includes libraries
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| 430 | found in B<$Config{libs}> and the first ModuleName.a library
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| 431 | for each extension that is found by searching B<@INC> or the path
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| 432 | specified by the B<-I> option.
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| 433 | In addition, when ModuleName.a is found, additional linker arguments
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| 434 | are picked up from the B<extralibs.ld> file in the same directory.
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| 435 |
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| 436 |
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| 437 | perl -MExtUtils::Embed -e ldopts -- -std Socket
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| 438 |
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| 439 |
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| 440 | This will do the same as the above example, along with printing additional arguments for linking with the B<Socket> extension.
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| 441 |
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| 442 |
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| 443 | perl -MExtUtils::Embed -e ldopts -- DynaLoader
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| 444 |
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| 445 |
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| 446 | This will print arguments for linking with just the B<DynaLoader> extension
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| 447 | and B<libperl.a>.
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| 448 |
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| 449 |
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| 450 | perl -MExtUtils::Embed -e ldopts -- -std Msql -- -L/usr/msql/lib -lmsql
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| 451 |
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| 452 |
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| 453 | Any arguments after the second '--' token are additional linker
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| 454 | arguments that will be examined for potential conflict. If there is no
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| 455 | conflict, the additional arguments will be part of the output.
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| 456 |
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| 457 |
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| 458 | =item perl_inc()
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| 459 |
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| 460 | For including perl header files this function simply prints:
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| 461 |
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| 462 | -I$Config{archlibexp}/CORE
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| 463 |
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| 464 | So, rather than having to say:
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| 465 |
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| 466 | perl -MConfig -e 'print "-I$Config{archlibexp}/CORE"'
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| 467 |
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| 468 | Just say:
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| 469 |
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| 470 | perl -MExtUtils::Embed -e perl_inc
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| 471 |
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| 472 | =item ccflags(), ccdlflags()
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| 473 |
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| 474 | These functions simply print $Config{ccflags} and $Config{ccdlflags}
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| 475 |
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| 476 | =item ccopts()
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| 477 |
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| 478 | This function combines perl_inc(), ccflags() and ccdlflags() into one.
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| 479 |
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| 480 | =item xsi_header()
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| 481 |
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| 482 | This function simply returns a string defining the same B<EXTERN_C> macro as
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| 483 | B<perlmain.c> along with #including B<perl.h> and B<EXTERN.h>.
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| 484 |
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| 485 | =item xsi_protos(@modules)
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| 486 |
|
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| 487 | This function returns a string of B<boot_$ModuleName> prototypes for each @modules.
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| 488 |
|
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| 489 | =item xsi_body(@modules)
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| 490 |
|
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| 491 | This function returns a string of calls to B<newXS()> that glue the module B<bootstrap>
|
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| 492 | function to B<boot_ModuleName> for each @modules.
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| 493 |
|
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| 494 | B<xsinit()> uses the xsi_* functions to generate most of its code.
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| 495 |
|
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| 496 | =back
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| 497 |
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| 498 | =head1 EXAMPLES
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| 499 |
|
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| 500 | For examples on how to use B<ExtUtils::Embed> for building C/C++ applications
|
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| 501 | with embedded perl, see L<perlembed>.
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| 502 |
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| 503 | =head1 SEE ALSO
|
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| 504 |
|
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| 505 | L<perlembed>
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| 506 |
|
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| 507 | =head1 AUTHOR
|
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| 508 |
|
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| 509 | Doug MacEachern E<lt>F<[email protected]>E<gt>
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| 510 |
|
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| 511 | Based on ideas from Tim Bunce E<lt>F<[email protected]>E<gt> and
|
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| 512 | B<minimod.pl> by Andreas Koenig E<lt>F<[email protected]>E<gt> and Tim Bunce.
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| 513 |
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| 514 | =cut
|
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| 515 |
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